Table 4. Interobserver agreement for CE-MRA and REACT, assessed by Kendall’s W (0.01–0.2 slight, 0.21–0.4 fair, 0.41–0.6 moderate, 0.61–0.8 substantial, and 0.81–0.99 almost perfect).

Criterion	CE-MRA	REACT
Vessel quality	0.48	0.52
Artifacts	0.52	0.58
Noise	0.51	0.46

CE-MRA, contrast-enhanced magnetic resonance angiography; REACT, relaxation-enhanced angiography without contrast and triggering.